A preparation method of electromagnetic wave absorbing material based on ferrite solid waste

A technology of absorbing materials and ferrites, applied in the direction of magnetic materials, inorganic materials, unspecified rubber coatings, etc., can solve the problems of electromagnetic impedance imbalance, insufficient dielectric loss, uneven size, etc. The effect of small solid waste discharge and low cost of raw materials

Active Publication Date: 2020-06-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, problems such as excessive grain size, uneven size, complex impurities, and composition segregation in the solid waste of soft ferrite materials are still problems to be solved urgently. Problems such as electromagnetic impedance imbalance and insufficient dielectric loss of a single material are also affecting key to performance
At present, there is no report on the production of microwave absorbing materials using solid ferrite waste.

Method used

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  • A preparation method of electromagnetic wave absorbing material based on ferrite solid waste
  • A preparation method of electromagnetic wave absorbing material based on ferrite solid waste
  • A preparation method of electromagnetic wave absorbing material based on ferrite solid waste

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Experimental program
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Embodiment 1

[0035] In this embodiment, the manganese-zinc ferrite industrial solid waste recovered by the soft magnetic core production line is used as the precursor, and the solid waste is prepared with a mass ratio of solid waste and glucose of 1:1 through the steps of purification, ball milling, and hydrothermal carbon coating. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0036] 1. Purification of solid waste

[0037] Place 3g of untreated manganese-zinc ferrite agglomerated and ground solid waste recovered from the magnetic core production line in a mortar and grind it thoroughly until it becomes powder; disperse the solid waste powder of manganese-zinc ferrite in 30ml In deionized water, mechanically stir to mix uniformly to form a suspension; the suspension is ultrasonically treated for 20 minutes to make the ferrite particles and impurities in the solid waste powder uniformly dispersed in the water; a 0.2T permanent ma...

Embodiment 2

[0045] In this embodiment, the manganese-zinc ferrite industrial solid waste recovered by the soft magnetic core production line is used as the precursor, and the solid waste is prepared with a mass ratio of solid waste and glucose of 1:3 through the steps of purification, ball milling, and hydrothermal carbon coating. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0046] 1. Purification of solid waste

[0047] Place 3g of untreated manganese-zinc ferrite agglomerated and ground solid waste recovered from the magnetic core production line in a mortar and grind it thoroughly until it becomes powder; disperse the solid waste powder of manganese-zinc ferrite in 30ml In deionized water, mechanically stir to mix uniformly to form a suspension; the suspension is ultrasonically treated for 20 minutes to make the ferrite particles and impurities in the solid waste powder uniformly dispersed in the water; a 0.2T permanent ma...

Embodiment 3

[0055] In this embodiment, the manganese-zinc ferrite industrial solid waste recovered by the soft magnetic core production line is used as the precursor, and the solid waste is prepared with a mass ratio of solid waste and glucose of 1:5 through the steps of purification, ball milling, and hydrothermal carbon coating. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0056] 1. Purification of solid waste

[0057] Place 3g of untreated manganese-zinc ferrite agglomerated and ground solid waste recovered from the magnetic core production line in a mortar and grind it thoroughly until it becomes powder; disperse the solid waste powder of manganese-zinc ferrite in 30ml In deionized water, mechanically stir to mix uniformly to form a suspension; the suspension is ultrasonically treated for 20 minutes to make the ferrite particles and impurities in the solid waste powder uniformly dispersed in the water; a 0.2T permanent ma...

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Abstract

The invention discloses a preparation method of an electromagnetic wave absorption material based on ferrite solid wastes. The electromagnetic wave absorption material with a composite structure is obtained by taking the ferrite solid wastes produced by grinding in a soft magnet magnetic core production link as a magnetic base body and covering carbon on a crystal boundary. A ferrite / carbon composite electromagnetic wave absorption material prepared by the preparation method has anti-oxidization and anti-corrosion capabilities; an interface carbon material is added so that the density of a wave absorption body can be reduced and light and thin wave absorption products are easy to produce; the mechanical properties also can be stabilized and reinforced. The electromagnetic wave absorption material prepared by the preparation method disclosed by the invention has wide applicability, is suitable for being used for absorbing electromagnetic waves with the frequency band of DC-42.5GHz and can be used for products including blocks, patches, pyramids, conoids, coatings, thin films and the like.

Description

Technical field [0001] The invention relates to a preparation method of an electromagnetic wave absorbing material, in particular to a preparation method of an electromagnetic wave absorbing material based on solid waste of ferrite, belonging to the technical field of absorbing functional materials. Background technique [0002] The integration of electromagnetic wave absorbing materials in electronic devices is the main way to solve the serious electromagnetic radiation and electromagnetic interference of equipment and equipment, and plays an important role in the purification of the electromagnetic environment and the protection of human health. Electromagnetic wave absorbing materials also occupy a major position in electromagnetic countermeasures and radar stealth applications in the military field. Therefore, with the rapid globalization of new products such as electronic information, mobile communications, wireless interconnection, smart homes, and new energy vehicles, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06C08L101/00C08L21/00C08K9/10C08K9/00C08K3/22C09D201/00C09D191/06C09D121/00C09D5/08C09D7/62H05K9/00H01F1/34H01F41/00
CPCC08K3/22C08K9/00C08K9/10C08K2003/2275C08K2201/01C09D5/08C09D121/00C09D191/06C09D201/00H01F1/344H01F41/00H05K9/0081C08L101/00C08L91/06
Inventor 汪嘉恒杨标李映欣蔡婧王雅萍张勇吴玉程
Owner HEFEI UNIV OF TECH
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